include/asm-arm/arch-davinci/memory.h

   1 /*
   2  * DaVinci memory space definitions
   3  *
   4  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #ifndef __ASM_ARCH_MEMORY_H
  12 #define __ASM_ARCH_MEMORY_H
  13
  14 /**************************************************************************
  15  * Included Files
  16  **************************************************************************/
  17 #include <asm/page.h>
  18 #include <asm/sizes.h>
  19
  20 /**************************************************************************
  21  * Definitions
  22  **************************************************************************/
  23 #define DAVINCI_DDR_BASE    0x80000000
  24 #define DAVINCI_IRAM_BASE   0x00008000 /* ARM Internal RAM */
  25
  26 #define PHYS_OFFSET DAVINCI_DDR_BASE
  27
  28 /*
  29  * Increase size of DMA-consistent memory region
  30  */
  31 #define CONSISTENT_DMA_SIZE (14<<20)
  32
  33 #ifndef __ASSEMBLY__
  34 /*
  35  * Restrict DMA-able region to workaround silicon bug.  The bug
  36  * restricts buffers available for DMA to video hardware to be
  37  * below 128M
  38  */
  39 static inline void
  40 __arch_adjust_zones(int node, unsigned long *size, unsigned long *holes)
  41 {
  42         unsigned int sz = (128<<20) >> PAGE_SHIFT;
  43
  44         if (node != 0)
  45                 sz = 0;
  46
  47         size[1] = size[0] - sz;
  48         size[0] = sz;
  49 }
  50
  51 #define arch_adjust_zones(node, zone_size, holes) \
  52         if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(node, zone_size, holes)
  53
  54 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + (128<<20) - 1)
  55
  56 #endif
  57
  58 /*
  59  * Bus address is physical address
  60  */
  61 #define __virt_to_bus(x)        __virt_to_phys(x)
  62 #define __bus_to_virt(x)        __phys_to_virt(x)
  63
  64 #endif /* __ASM_ARCH_MEMORY_H */